Overview
You cannot go inside Bourchier’s Castle, so set your expectations accordingly: this is a tower you look at, not one you climb. The five-storey keep stands near the shore of Lough Gur, one of Ireland’s most archaeologically rich lakes, in County Limerick, guarding the old eastern approach to Knockadoon Hill. The interior is closed and the structure is unrestored, but the exterior is clearly visible from the car park and the public footpaths that trace the lakeshore. It is a ten-minute stop, best folded into a longer walk around the lake rather than treated as a destination in itself.
History and the Desmond connection
Also recorded as Lough Gur Castle or Castle Doon, the tower house is hard to date precisely – sources put it anywhere from the 15th to the early 17th century, and one account holds that the present structure dates from around 1600 and replaced an earlier castle on the same spot, with some older features carried into it. Either way, it was a Desmond stronghold: a 1536 Crown survey identified it as James of Desmond’s chief fortress in the county, its defences strengthened by the surrounding water, rock and mountains.
After the fall of the Earls of Desmond, the lands at Lough Gur were granted in the 1580s to Sir George Bourchier, son of the second Earl of Bath, and the name stuck; the family held it until 1641. A 1583 survey recorded a substantial complex – nine rooms, a barbican with a defensive turret, barns, stables, an orchard and tenant cottages – and Thomas Dineley’s 1680 illustrations show it perched on a narrow causeway with a drawbridge controlling access.
Architecture
The ruin is a clear example of late-medieval sectional construction, where a tower house was extended in phases while keeping its structure sound.
- Eastern block – built first, with the entrance lobby, a murder hole, a guard room fitted with circular gun ports and a spiral staircase in the north-east corner. Distinctive quoin stones mark this original phase.
- Western block – added later for larger living quarters and bonded to the eastern wing with projecting through-stones.
- Windows and detail – the upper floors carry ogee-headed windows with hood mouldings, and a four-light mullioned and transomed window dates to the 16th century, a sign of the period’s shift toward domestic comfort.
- Defences – a vaulted ceiling protects the ground floor, while the remnants of the barbican and drawbridge recall its martial origins.
A short walk south leads to the surviving Bourchier dovecote, a 16th-century pigeon house that once supplied fresh meat to the household. Both are visible from the public paths.
Around Lough Gur
Bourchier’s Castle works best as one stop on a circuit of the lake. The shoreline paths give uninterrupted views of the tower, best in early morning or late afternoon when the light catches the stone. The real draw, though, is the wider site: the Grange Stone Circle, the largest in Ireland, the 13th-century Black Castle (another Desmond seat), crannogs out on the water, and the Lough Gur Visitor Centre, which carries the area’s archaeology from the Neolithic to the medieval. Guided walks often take in the castle and explain its relationship to the surrounding ringforts and to the legendary Gearóid Iarla, the 14th Earl of Desmond. Birdwatchers will find mute swans, coots, tufted ducks and the occasional kingfisher along the reed beds.
The castle is on the OPW list for restoration. The visitor centre, worth knowing, already operates from its own building nearby – this tower is not being turned into one.
Practical information
- Access and viewing – The exterior is freely accessible from the lakeshore footpaths. Paths are natural and uneven, so wear sturdy footwear. The approach is not fully wheelchair accessible.
- Parking and facilities – Free parking at the Lough Gur Lakeshore Park and Visitor Centre, a short walk from the castle viewpoints; toilets and a small shop are at the centre.
- Opening hours and admission – The ruin has no opening hours and can be viewed any day, free. The visitor centre charges €5 adult, €4 senior/student, €3 child and €15 family; check seasonal hours before travelling.
- Getting there – Lough Gur lies about 20 km south of Limerick city, signposted off the R512 Limerick–Kilmallock road. Bus services from Limerick are limited, so check current timetables.
- Nearby – Pair the visit with Bolin Island, one of Ireland’s most accessible prehistoric crannogs, on the lake itself.
Come for the morning light on the tower if you are a photographer; otherwise, give the castle ten minutes and spend the rest of your time on the Grange Stone Circle and the lakeshore loop, which are the reason Lough Gur is worth the trip.